ChemSusChem
·
2024
·
IF 7.5
Guo Xusheng,Qin Chuan,Si Yuxi,Lyu Xilei,Youwei Cheng
5-Hydroxymethylfurfural(HMF) is a versatile chemical synthesized from glucose dehydration catalyzed by metal chloride (MClx) in deep eutectic solvents (DESs). However, the low glucose concentration and high catalyst dosage hinder large-scale HMF production. Herein, we report an aqueous DES of tetraethylammonium bromide(TEAB)-glucose for converting concentrated glucose (40 wt%, relative to TEAB) using ultra-dilute SnCl4 (0.25 mol%), achieving a 62% yield of HMF. Ultra-dilute MClx-catalyzed selective conversion of glucose is feasible only when combining SnCl4 with Br-based DES, which is elucidated by density functional theory and molecular dynamic calculations. Using SnCl4 is essential due to its higher glucose isomerization activity than AlCl3 and CrCl3, which can be attributed to its low-barrier coordination with glucose and its barrier-free separation from fructose. Halide anions in DESs strongly interact with glucose, hindering the MClx-glucose coordination and thereby reducing MClx’s activity for glucose isomerization. Consequently, Br-based DESs facilitate higher activity of MClx than Cl-based DESs, due to the weaker interaction between halide anion and glucose. In addition, we elucidated the side reactions including condensation, polymerization, and isomerization, and proposed a reaction network. Our findings clarify the differential activity of MClx and the impact of halide anions in DESs on MClx’s activity.
研究领域:
化学工程
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催化
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绿色化学
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材料科学
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计算化学
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产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2021
·Vol. 15
·期 13
·e202101889
·
IF 8.928
Miao Zuo,Xinyu Wang,Qian Wang,Xianhai Zeng,Lu Lin
Graphical HMF synthesis in NADES : High yield of 5-hydroxymethylfurfural (HMF) is obtained in a cheap and green natural deep eutectic solvent (NADES) system with a low amount of SnCl 4 catalyst from different biomass materials, including glucose, starch, and food wastes. The addition of water obviously improves the reactivity and economy of the NADES mixture. This is a green and efficient method to utilize carbohydrate resources for HMF production in a robust solvent system. 5-Hydroxymethylfurfural (HMF) has been regarded as an essential building block for synthesizing chemicals and biofuels, but the direct conversion of biomass to HMF is still a critical challenge. In this study, a cheap and green aqueous-natural deep eutectic solvent (A-NADES) was used to efficiently produce HMF from various carbohydrates, with a low amount of SnCl 4 as the catalyst. High HMF yields of 64.3, 64.0, 61.3, and 54.5 % were obtained from glucose, starch, rice waste, and bread waste at 130 °C in the A-NADES/MIBK (methyl isobutyl ketone) biphasic system, respectively. Mechanistic study results revealed that the water in A-NADES was the key factor in facilitating the conversion of Sn atom existent forms and promoted the HMF production. The choline chloride in NADES stabilized the HMF product with the cooperation of extraction solvent MIBK and inhibited the side reactions of HMF. This study investigated the multiple interaction functions of A-NADES to feedstocks and proposed a practical application of novel solvents to facilitate biomass and food waste conversion with a green method.
研究领域:
生物化学
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绿色化学
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可再生能源
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产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 29
·e202301752
·
IF 2.1
Shuiqing He,Hong Yuan,Xiang Yang
Graphical Double-layer hollow porous carbon microspheres (DPCMs) were synthesized by hydrothermal method using sucrose as carbon source, SnCl 4 ⋅ 5H 2 O as the porogen, sodium dodecyl sulfate as the anionic surfactant, and sodium polyacrylate as dispersant. Double-layer hollow porous carbon microspheres (DPCMs) with high specific surface area (up to 57.3 m 2 /g) were synthesized by a hydrothermal method using sucrose as the carbon source, SnCl4 ⋅ 5H 2 O as the porogen, and sodium dodecyl sulfate and sodium polyacrylate as the anionic surfactant and dispersant, respectively. The thickness and morphology of the inner and outer layers of the DPCMs (spherical, bowl-like, mushroom-like, or ellipsoidal) could be adjusted by changing the hydrothermal conditions. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared analysis (FTIR) showed that the surface of the DPCMs was rich in −OH and −COOH functional groups, which was beneficial for subsequent chemical modification of the DPCMs. Because the prepared DPCM had a reactive surface layer and a stable carbonaceous double-layer structure, the material could be used in supercapacitors and biochemistry, and as catalyst carriers, adsorption materials, and electrode materials, among other applications.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2015
·
IF 4.494
Wenju Wang,Junli Ren,Huiling Li,Aojie Deng,Runcang Sun
Direct catalytic transformation of xylan-type hemicelluloses to furfural in the aqueous system and the biphasic system were comparatively investigated under mild conditions. Screening of several promising chlorides for conversion of beech xylan in the aqueous system revealed the Lewis acid SnCl 4 was the most effective catalyst. Comparing to the single aqueous system, the bio-based 2-methyltetrahydrofuran (2-MTHF)/H 2 O biphasic system was more conducive to the synthesis of furfural, in which the highest furfural yield of 78.1% was achieved by using SnCl 4 as catalysts under the optimized reaction conditions (150 °C, 120 min). Additionally, the influences of xylan-type hemicelluloses with different chemical and structural features from beech, corncob and bagasse on the furfural production were studied. It was found that furfural yield to some extent was determined by the xylose content in hemicelluloses and also had relationships with the molecular weight of hemicelluloses and the degree of crystallization.
研究领域:
化学工程
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生物化工
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可再生能源
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2020
·
IF 4.748
Chao Liu,Min Wei,Fei Wang,Linshan Wei,Xiaoyan Yin,Jianchun Jiang,Kui Wang
Thermochemical conversion of lignocellulosic biomass into value-added chemicals has attracted great interest worldwide. Herein, we report an effective and facile process to transform bamboo into 5-hydroxymethylfurfural (5-HMF), furfural (FF) and levulinic acid (LA) using metal chlorides as catalysts. The effects of the reaction parameters, such as the reaction time, temperature, initial pressure and catalyst loading on the bamboo conversion and product yields were investigated. Notably, the optimum reaction conditions were heating 200 °C for 2 h using 0.75 g of SnCl 4 as catalyst in a 90.0 wt% aqueous sulfolane solution, where the conversion of bamboo was 90.0 wt% forming 41.2 mol% of 5-HMF, 20.1 mol% of FF and 24.6 mol% of LA. The synergistic effect of [Sn(OH) 3 (aq)] + and cation polarization has an important role in the outstanding efficiency and specificity of our selective liquefaction system. Moreover, the water/sulfolane system displays excellent performance for maintaining the Lewis acid active sites in [Sn(OH) 3 (aq)] + . In the process, sulfolane regulates the hydrolysis of SnCl 4 to provide an effective Lewis acid strength. This study sheds light on the remarkable potential of the process for future industrial application.
研究领域:
化学工程
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生物质能
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催化化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qingfei Hao,Ying Gao,Fei Chen,Xiangtao Chen,Yang Qi,Na Li
Solid-polymer-electrolytes (SPEs) are under active consideration for their high-energy and safe electrochemical energy storage. However, conventional polymer electrolytes are facing poor electrolyte/electrode interfacial contact and undesired lithium dendrite problems. Here, we report a polymerized-dioxolane (P-DOL) electrolytes created by in situ polymerization of DOL in the presence of tin tetrachloride (SnCl 4 ), which enables ultra-conformal interfacial contact with all cell components. More importantly, SnCl 4 plays a dual function by initiating ring-opening polymerization of DOL and simultaneously forming a LiCl/Li x Sn-based alloy composite protective layer on Li metal anodes. The robust Li-rich ion conductive alloys coupled with an electronically insulating surface component form fast ion transport channels. Using the SnCl 4 -initiated P-DOL SPEs exhibits a high ionic conductivity (>2 mS cm −1 ) and a wide electrochemical window (4.7 V) at room temperature. Applications of P-DOL SPEs in Li/Li symmetric and Li/LiFePO 4 batteries further demonstrate low polarization and high capacity retention. This work provides a facile and practical approach to designing P-DOL SPEs for high-performance lithium metal batteries.
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DOI
高影响因子
Molecular Catalysis
·
2021
·
IF 5.062
Teng Li,Guangyu Sun,Lu Xiong,Boying Zheng,Yaqi Duan,Rui Yu,Jun Jiang,Yantao Wang,Weiran Yang
As a useful chemical, furan can be produced from bio-based chemicals, such as furfural and furoic acid (FA). There were few reports on the preparation of furan from bio-based C6 aldaric acids . Herein, a new method was developed to produce furan from D-glucaric acid (GA) without transition metals, and nearly 80% yield of furan was produced in the water/toluene biphasic system with SnCl 4 at 200 °C in 2 h. 3-Hydroxy-2-pyrone (3-HP) and FA were proved to be the key intermediates in the formation of furan from GA, and the reaction pathway was proposed to be GA→ 3-HP→ FA→ furan based on the kinetic study , model substrate reaction, and isotope labeling experiments. SnCl 4 gave the highest furan yield among the common acid catalysts, and the contrast experiments suggested that H + , Cl − and Sn 4+ all have promoting effect on GA conversion to furan. This method was also applicable with other C6 aldaric acids.
研究领域:
生物化学
·
有机化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 7
·5359-5365
·
IF 2.993
Guo Bing,Lin Xiuzhen
A novel hierarchically mesoporous–macroporous tin organophosphonate with intra-framework organic groups is successfully fabricated through a facile hydrothermal route with SnCl 4 ·5H 2 O as tin source and diethylene triamine pentakis(methylphosphonic acid) as organophosphorus source in the presence of cetyltrimethylammonium bromide (CTAB) as the templating agent. The as-prepared hybrid had macroporous structures with the pore size in the range of 0.6–2.1 μm and a specific surface area of 170 m 2 /g. Besides, the pore walls had particle-aggregated mesoporous substructures, consisting of amorphous tin organophosphonates, as characterized by SEM, TEM and N 2 adsorption analysis and wide- and low-angle X-ray diffraction. FT-IR and NMR results indicated the integrity of the organophosphonate groups into the hybrid solid. It was found that the surfactant CTAB played an important role in obtaining macropores, and a possible formation route was proposed.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）